[FIR] Support constructor call of unsigned in checker

compiler/testData/codegen/bytecodeText/constants/inlineUnsignedIntConstant.kt

@@ -1,5 +1,4 @@
 // !LANGUAGE: +InlineClasses
-// IGNORE_BACKEND_FIR: JVM_IR
 
 // FILE: uint.kt
 
@@ -9,6 +8,9 @@ inline class UInt(val value: Int)
 
 // FILE: test.kt
 
+//this import in required in FIR because default imports don't search in local sources atm
+import kotlin.UInt
+
 const val u = UInt(14)
 
 fun foo() {

compiler/testData/diagnostics/tests/unsignedTypes/allowedVarargsOfUnsignedTypes.fir.kt

@@ -1,12 +0,0 @@
-// !DIAGNOSTICS: -UNUSED_PARAMETER
-
-fun ubyte(vararg a: UByte) {}
-fun ushort(vararg a: UShort) {}
-fun uint(vararg a: UInt) {}
-fun ulong(vararg a: ULong) {}
-
-class ValueParam(vararg val a: ULong)
-
-annotation class Ann(vararg val a: <!INVALID_TYPE_OF_ANNOTATION_MEMBER!>UInt<!>)
-
-fun array(<!FORBIDDEN_VARARG_PARAMETER_TYPE!>vararg<!> a: UIntArray) {}

compiler/testData/diagnostics/tests/unsignedTypes/allowedVarargsOfUnsignedTypes.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 fun ubyte(vararg a: UByte) {}